Light-emitting diode - Wikipedia
In electrical engineering, a light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, thereby …
LED | Definition, Light, & Facts | Britannica
Nov 25, 2025 · An LED (light-emitting diode) is a semiconductor device that emits infrared or visible light when charged with an electric current.
Learn About LED Lighting - ENERGY STAR
When designed well, LED lighting is more efficient, versatile, and lasts longer. LEDs are “directional” light sources, which means they emit light in a specific direction, unlike incandescent and CFL, which …
Light Emitting Diode (LED): What is it & How Does it Work?
Feb 24, 2012 · This page is about Solid State Light or Light Emitting Diode or LED including the introduction of the working principle of LED. The features of LED are also mentioned in this article.
Light Emitting Diode (LED): Principle, Advantages, and Uses
Jun 10, 2025 · A light-emitting diode (LED) is a small electronic device that emits light when an electric current flows through it. LED works by passing electricity through a semiconductor, which releases …
Qu'est-ce que la lumière LED ? Guide complet des diodes ...
Jan 21, 2025 · Dans cet article, nous expliquerons ce qu'est la lumière LED, comment fonctionnent les LED et pourquoi les lampes LED sont le meilleur choix pour les solutions d'éclairage modernes.
La diode LED : cours et principe de fonctionnement
Une LED est une diode qui émet de la lumière quand elle polarisée en direct. Elle est maintenant très utilisée pour l'éclairage en remplacement des lampes à incandescence et depuis 1975 comme …
What is an LED? | All About LEDs | Adafruit Learning System
Feb 11, 2013 · In fact, the first two letters of LED stand for Light Emitting. A really nice thing about LEDs is that they are very simple. Unlike some chips that have dozens of pins with names and special …
Light Emitting Diode Basics | LED Types, Colors and Applications
Sep 16, 2024 · This article is composed as a brief understanding guide to LED, which includes a brief introduction, the electrical symbol of LED, types, construction, characteristics, LED Drivers and many.
LED (Light-emitting diode) explained - Soldered Electronics
The inside of the LED consists of two main parts – post and anvil. The post is the positive side of the LED, the anode side, and the anvil is the negative side, the cathode.